:root {
  color-scheme: dark;
  --bg: #05070a;
  --panel: rgba(12, 17, 23, 0.82);
  --panel-strong: rgba(16, 23, 31, 0.96);
  --line: rgba(255, 255, 255, 0.12);
  --text: #f4f7fb;
  --muted: #94a0ad;
  --blue: #20a8ff;
  --red: #ff4747;
  --amber: #ffb22e;
  --green: #58df83;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.48);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-width: 320px;
  background:
    radial-gradient(circle at 20% 10%, rgba(32, 168, 255, 0.16), transparent 34rem),
    radial-gradient(circle at 84% 20%, rgba(255, 71, 71, 0.15), transparent 32rem),
    linear-gradient(180deg, #06090d 0%, #05070a 48%, #080b0f 100%);
  color: var(--text);
  font-family: "Arial", "Helvetica Neue", sans-serif;
  overflow-x: hidden;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  content: "";
  background:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.018) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: linear-gradient(to bottom, black, transparent 78%);
}

.grain {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  opacity: 0.18;
  background-image: repeating-radial-gradient(circle at 20% 30%, rgba(255,255,255,0.2) 0 1px, transparent 1px 4px);
  mix-blend-mode: overlay;
}

a {
  color: inherit;
  text-decoration: none;
}

.nav-shell {
  position: fixed;
  top: 18px;
  left: 50%;
  z-index: 20;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: min(1180px, calc(100% - 28px));
  min-height: 56px;
  padding: 8px 10px 8px 16px;
  transform: translateX(-50%);
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(7, 10, 14, 0.78);
  box-shadow: var(--shadow);
  backdrop-filter: blur(18px);
}

.brand,
.nav-live {
  display: inline-flex;
  gap: 10px;
  align-items: center;
  white-space: nowrap;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-mark,
.nav-live span {
  width: 10px;
  height: 10px;
  border-radius: 50%;
}

.brand-mark {
  background: linear-gradient(135deg, var(--blue), var(--red));
  box-shadow: 0 0 22px rgba(32, 168, 255, 0.7);
}

.nav-live {
  padding: 12px 16px;
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.05);
}

.nav-live span {
  background: var(--red);
  box-shadow: 0 0 18px rgba(255, 71, 71, 0.9);
}

nav {
  display: flex;
  justify-content: center;
  gap: clamp(14px, 3vw, 34px);
}

nav a {
  color: var(--muted);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.13em;
  text-transform: uppercase;
}

nav a:hover {
  color: var(--text);
}

main {
  overflow-x: hidden;
}

.hero {
  position: relative;
  display: grid;
  min-height: 100vh;
  padding: 140px max(22px, 4vw) 72px;
  isolation: isolate;
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}

.hero-backdrop img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: saturate(0.95) contrast(1.15) brightness(0.48);
  transform: scale(1.06);
}

.hero::after {
  position: absolute;
  inset: 0;
  z-index: -1;
  content: "";
  background:
    radial-gradient(circle at 50% 30%, transparent 0 18rem, rgba(5, 7, 10, 0.42) 36rem),
    linear-gradient(90deg, rgba(5, 7, 10, 0.78), rgba(5, 7, 10, 0.28), rgba(5, 7, 10, 0.78)),
    linear-gradient(180deg, transparent 55%, var(--bg) 100%);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  align-items: end;
  gap: 32px;
  width: min(1280px, 100%);
  margin: auto;
}

.hero-copy {
  max-width: 1040px;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 1120px;
  margin-bottom: 24px;
  font-size: clamp(3.25rem, 6.9vw, 7.4rem);
  line-height: 0.9;
  letter-spacing: 0;
  text-wrap: balance;
}

h2 {
  font-size: clamp(2.3rem, 4.8vw, 5.2rem);
  line-height: 0.94;
  letter-spacing: 0;
  text-wrap: balance;
}

h3 {
  font-size: 1.08rem;
}

.hero-text {
  max-width: 650px;
  color: #c7d0da;
  font-size: clamp(1.08rem, 1.65vw, 1.38rem);
  line-height: 1.55;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button,
button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 48px;
  padding: 0 18px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--text);
  font: inherit;
  font-weight: 900;
  cursor: pointer;
  transition: transform 180ms ease, border-color 180ms ease, background 180ms ease;
}

.button:hover,
button:hover {
  transform: translateY(-2px);
}

.primary {
  border-color: rgba(32, 168, 255, 0.65);
  background: linear-gradient(135deg, #0f6fb8, #153855);
}

.secondary {
  border-color: rgba(255, 178, 46, 0.65);
  background: linear-gradient(135deg, #6b4308, #1d1609);
}

.ghost {
  background: rgba(255, 255, 255, 0.06);
}

.hero-console,
.panel,
.agent-panel,
.brief-card {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--panel);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
}

.hero-console {
  padding: 18px;
}

.console-head,
.panel-top,
.brief-meta,
.total-line {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: center;
}

.console-head {
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.console-head span,
.panel-top span {
  color: var(--muted);
  font-size: 0.72rem;
  font-weight: 900;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}

.signal-row {
  display: grid;
  grid-template-columns: 12px 1fr;
  gap: 14px;
  padding-top: 18px;
}

.signal {
  width: 10px;
  height: 10px;
  margin-top: 5px;
  border-radius: 50%;
}

.signal.blue {
  background: var(--blue);
  box-shadow: 0 0 20px rgba(32, 168, 255, 0.85);
}

.signal.red {
  background: var(--red);
  box-shadow: 0 0 20px rgba(255, 71, 71, 0.85);
}

.signal-row small {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  line-height: 1.4;
}

.broadcast-shell,
.control-grid,
.past-battles,
.reference-strip,
.final-cta {
  width: min(1280px, calc(100% - 36px));
  margin-inline: auto;
}

.broadcast-shell,
.past-battles,
.final-cta {
  padding: 118px 0 0;
}

.section-title {
  max-width: 860px;
  margin-bottom: 34px;
}

.arena {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(280px, 0.86fr) minmax(0, 1.08fr);
  gap: 12px;
}

.agent-panel,
.brief-card,
.panel {
  padding: 20px;
}

.blue-team {
  border-color: rgba(32, 168, 255, 0.35);
}

.red-team {
  border-color: rgba(255, 71, 71, 0.38);
}

.agent-panel h3 {
  margin-bottom: 0;
}

.blue-team h3,
.blue-text {
  color: var(--blue);
}

.red-team h3,
.red-text {
  color: var(--red);
}

pre {
  min-height: 278px;
  margin: 20px 0;
  overflow: hidden;
  color: #dce7ef;
  font: 0.82rem/1.62 "Courier New", monospace;
}

.agent-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.agent-metrics span {
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 0.72rem;
  text-transform: uppercase;
}

.agent-metrics b {
  display: block;
  color: var(--text);
  font-size: 1rem;
}

.brief-card p,
.brief-card li,
.judging p,
.result-card p,
.final-cta p {
  color: #c5ced8;
  line-height: 1.6;
}

.brief-card ul {
  padding-left: 18px;
}

.brief-meta {
  margin-top: 28px;
  padding-top: 18px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.76rem;
  text-transform: uppercase;
}

.brief-meta b {
  color: var(--amber);
}

.control-grid {
  display: grid;
  grid-template-columns: 1.15fr 1.15fr 0.88fr 1fr;
  gap: 12px;
  padding-top: 12px;
}

.panel {
  min-height: 360px;
}

.timeline ol {
  display: grid;
  gap: 13px;
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.timeline li {
  display: grid;
  grid-template-columns: 54px 1fr auto;
  gap: 10px;
  color: #dbe4ec;
  font-size: 0.82rem;
}

.timeline time,
.timeline b {
  color: var(--muted);
  font-size: 0.72rem;
}

.score-row {
  display: grid;
  grid-template-columns: 104px 1fr 1fr;
  gap: 12px;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.score-row span {
  color: #d9e2eb;
  font-size: 0.86rem;
}

meter {
  width: 100%;
  height: 10px;
}

meter::-webkit-meter-bar {
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
}

meter:nth-of-type(1)::-webkit-meter-optimum-value {
  border-radius: 999px;
  background: linear-gradient(90deg, #155071, var(--blue));
}

meter:nth-of-type(2)::-webkit-meter-optimum-value {
  border-radius: 999px;
  background: linear-gradient(90deg, #6b1a1a, var(--red));
}

.total-line {
  padding-top: 18px;
  font-size: 1.4rem;
}

.total-line span {
  color: var(--muted);
  font-size: 0.8rem;
  text-transform: uppercase;
}

.artifact-preview {
  margin-top: 20px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #090d12;
}

.browser-bar {
  display: flex;
  gap: 6px;
  padding: 10px;
  border-bottom: 1px solid var(--line);
}

.browser-bar span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
}

.mini-page {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
  min-height: 160px;
  padding: 12px;
}

.mini-page div {
  border-radius: 6px;
  background: linear-gradient(135deg, rgba(32, 168, 255, 0.25), rgba(255, 71, 71, 0.2));
}

.mini-page div:first-child {
  grid-column: span 2;
}

.file-list {
  display: grid;
  gap: 8px;
  padding: 0;
  margin: 18px 0 0;
  list-style: none;
}

.file-list li {
  display: flex;
  justify-content: space-between;
  padding: 9px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  color: #dbe4ec;
  font-size: 0.82rem;
}

.file-list b {
  color: var(--green);
}

.judge-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 8px;
  margin: 24px 0;
}

.judge-grid span {
  display: grid;
  place-items: center;
  aspect-ratio: 1;
  border: 1px solid var(--line);
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  color: var(--text);
  font-weight: 900;
}

.vote-row {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 8px;
}

.vote-row button:first-child {
  border-color: rgba(32, 168, 255, 0.45);
  background: rgba(32, 168, 255, 0.13);
}

.vote-row button:last-child {
  border-color: rgba(255, 71, 71, 0.45);
  background: rgba(255, 71, 71, 0.13);
}

.reference-strip {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 28px;
  align-items: center;
  padding: 130px 0 0;
}

.reference-strip img {
  display: block;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transition: transform 600ms ease, filter 600ms ease;
}

.reference-strip a:hover img {
  filter: brightness(1.08);
  transform: scale(1.02);
}

.battle-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.result-card {
  min-height: 270px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.07), rgba(255, 255, 255, 0.025));
  transition: transform 220ms ease, border-color 220ms ease;
}

.result-card:hover {
  border-color: rgba(255, 178, 46, 0.42);
  transform: translateY(-4px);
}

.result-card span {
  color: var(--amber);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.result-card h3 {
  margin-top: 56px;
  font-size: 1.55rem;
  line-height: 1.08;
}

.result-card b {
  display: block;
  margin-top: 24px;
  font-size: 2rem;
}

.final-cta {
  display: grid;
  justify-items: center;
  padding-bottom: 112px;
  text-align: center;
}

.final-cta p {
  max-width: 650px;
  font-size: 1.12rem;
}

footer {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  width: min(1280px, calc(100% - 36px));
  margin: 0 auto;
  padding: 26px 0 36px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 0.82rem;
}

.reveal {
  opacity: 1;
  transform: translateY(0);
}

.js-enabled .reveal {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 700ms ease, transform 700ms ease;
}

.js-enabled .reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1080px) {
  .hero-grid,
  .arena,
  .reference-strip {
    grid-template-columns: 1fr;
  }

  .control-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hero-console {
    max-width: 520px;
  }
}

@media (max-width: 760px) {
  .nav-shell {
    grid-template-columns: 1fr auto;
    left: 14px;
    width: calc(100% - 28px);
    transform: none;
    border-radius: 18px;
    overflow: hidden;
  }

  nav {
    display: none;
  }

  .nav-live {
    display: none;
  }

  .hero {
    min-height: auto;
    padding-top: 124px;
    padding-right: 22px;
    padding-left: 22px;
  }

  .hero-grid,
  .hero-copy,
  .hero-console {
    width: 100%;
    max-width: 100%;
    min-width: 0;
  }

  h1 {
    font-size: clamp(2.6rem, 12.4vw, 3.5rem);
    line-height: 0.94;
  }

  .hero-text {
    font-size: 1rem;
  }

  .hero-actions,
  footer {
    flex-direction: column;
  }

  .button,
  button {
    width: 100%;
  }

  .control-grid,
  .battle-list {
    grid-template-columns: 1fr;
  }

  .agent-metrics {
    grid-template-columns: 1fr;
  }

  .timeline li {
    grid-template-columns: 46px 1fr;
  }

  .timeline b {
    grid-column: 2;
  }

  .score-row {
    grid-template-columns: 1fr;
  }

  .vote-row {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .hero-copy,
  .hero-text,
  .hero-actions,
  .hero-console {
    max-width: 346px;
  }
}